Redemption: Error when using Task Scheduler

Asked Jul 28 '21 at 13:19

Active Aug 29 '21 at 15:00

Viewed 120 times

I use a self written tool that uses Outlook Redemption to do some sync between our own data and a some user's calendars on Office365. When running the tool under the admin account on a Windows server, it works perfectly. When running it as a scheduled task under that same account, it does not. It says:

Error in IMAPISession::OpenMsgStore(pbExchangeProviderPrimaryUserGuid): MAPI_E_LOGON_FAILED

Any suggestions?

edited Aug 29 '21 at 15:00

Eugene Astafiev

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asked Jul 28 '21 at 13:19

Marc Corbeel

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If your mailbox is OAuth (as opposed to Basic Auth), the auth tokens cannot be shared between apps running in different security contexts - note that Task Scheduler runs in a different context even if the local user is the same. – Dmitry Streblechenko Jul 28 '21 at 17:00
Thank you for the answer. How can I solve this? Do I need to change settings on the Exchange accounts? Or is there another solution? – Marc Corbeel Jul 29 '21 at 07:48
I don't think there is anything you can do... – Dmitry Streblechenko Jul 29 '21 at 12:16
You wrote about OAuth as opposed to Basic Auth. Is this a setting, can you choose between the 2, or is OAuth inherent to Office365? – Marc Corbeel Jul 30 '21 at 10:22
It is a settings set by the Exchange admin. – Dmitry Streblechenko Jul 30 '21 at 15:30
See [Account setup with modern authentication in Exchange Online](https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-for-ios-and-android/setup-with-modern-authentication) – Eugene Astafiev Aug 29 '21 at 15:01

Redemption: Error when using Task Scheduler

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